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Biomedical subjects

R J Cassingham

Publications and source records attributed to R J Cassingham.

At least 19 recordsLinked to original sources
PubMed1986

Relationship of maxillary molar root angulation and palatal vault height.

If the vertical angulation of maxillary molar roots could be reliably predicted, this might affect the choice of roots resection procedures. In an attempt to develop this prediction, angulation of palatal roots was compared to palatal vault height. Human cadaveric maxillae with molars were sectioned faciopalatally through each tooth root to the palatal midline and photographed. Root angles and palatal height were measured on the photographs in relation to a reference line connecting buccal and palatal cementoenamel junctions (CEJ). Palatal vault heights were classified as low, medium, or high according to the perpendicular distance from the midpalatal suture to the reference line. Root angles were subtended by a line following the length of pulp canals and perpendicular to the CEJ reference. Analysis by Spearman's Rank Correlation Coefficient demonstrated a weak nonsignificant relationship between palatal vault height and the angulation of the various maxillary molar roots. Thus, palatal vault height would not be a reliable predictor of root angulation if this were to be used as a basis for root retention.

Adult↗
PubMed1979

Peridontal manifestations and treatment in a case of Sturge-Weber syndrome.

A case of Sturge-Weber syndrome, uncommon in its intraoral extent, is presented. The pathologic process involved both the soft and osseous tissues of both the maxilla and mandible of the affected side. The first known histopathologic description of alveolar bone involvement is presented. The patients was treated by means of extractions and periodontal flap surgery on both an outpatient and an inpatient basis, with good results and no untoward sequelae. common clinical findings in Sturge-Weber syndrome and specific signs and symptoms manifested by this patient are discussed.

Adult↗
PubMed1979

A laboratory technique for teaching root resection.

A simple inexpensive method of making a laboratory model for the teaching of root resection has been presented. The technique of fabrication of the models requires only a rubber dental model mold, extracted or dentiform teeth, laboratory wax, and laboratory stone or plaster. This is one attempt to fulfill the need for developing laboratory exercises for the teaching of the various periodontal procedures.

Apicoectomy↗
PubMed1979

Comparison of healing following periodontal surgery with and without dressings in humans.

Seven patients with chronic moderate to severe generalized periodontitis requiring periodontal flap surgery were selected for study. Internally beveled full thickness, apically positioned flaps with osseous recontouring were performed in 20 quadrants. Half the quadrants received a noneugenol dressing, and the other half were left undressed. Fluid Index, Gingival Index, inflammatory index, pocket depth and patient comfort were studied up to 16 weeks postoperatively. Results showed no difference in these parameters between quadrants where periodontal dressings were or were not used following surgery. The patients reported more pain and discomfort and the pain and discomfort was more severe postoperatively when the dressing was used. The results of this study suggest that a surgical dressing serves no useful purpose when periodontal flap surgery is performed.

Adult↗
PubMed1977

A scanning electron microscopic study of the healing of free gingival grafts.

1. Gingiva from the buccal surfaces of the mandibular first molars was grafted to the alveolar mucosa of each of the three premolars in six adult Beagle dogs. Biopsies were made at 0,2,3,4,5,6,7,8,10,14,21 days and at 1 and 6 months. 2. The specimens were fixed in 2% glutaraldehyde, buffered with cacodylate, pH 7.4, rinsed in buffer, dehydrated in graded alcohols, critical point dried, coated with gold palladium alloy and viewed in an AMR-1000 SEM at a tilt of 20 to 25 degrees and an accelerating voltage of 20 kv. 3. The results of this study parallel those reported on the basis of light microscopic studies. The three-dimensional visualization of the graft shows that the external layer of epithelium degenerates and desquamates, except for the basal layer and the structural architecture of the connective tissue is not as well organized. 4. By 21 days the graft is essentially healed, both clinically and histologically.

Animals↗